Heat a non stick pan on medium heat. Add arrowroot powder, milk and water. Mix all the ingredients well. Stir continuously for 10 minutes on a medium to low heat. It should be mixed evenly - else it may form lumps. When the mixture slightly thickens (approximately 15 minutes), add melted and sieved jaggery (or sugar) and mix well. Adjust heat to low to medium and stir well until this mixture leaves from the pan / thickens (it may take another 15 minutes to reach at this stage). Switch off the heat. Sprinkle cardamom powder and mix well.

Grease a steel thali with 1/2 teaspoon ghee / oil and keep aside.

Pour the mixture on a greased thali and spread it evenly with a flat spatula. Keep aside to cool for one hour and later cut it into desired shape and sizes.